Thunder Bay, Ontario, Canada Climate Change Severity

62
Very High
The current climate change severity in Thunder Bay is Very High, with a 20.3% worsening in the climate score compared to last 16 years. This suggests deteriorating conditions, with increasing negative impacts on weather patterns and environmental conditions.
Data: Jan. to Aug. (Historical Vs 2026) - Weather Data Only
Low
020
Moderate
40
High
60
Very High
80
Extreme
100
°C

Thunder Bay Weather Condition Changes (Historic Vs 2026)

2026
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
Historic
2026

Over the past 16 year(s), Thunder Bay temperature has changed by around +31.07%, and has experienced notable climate changes.

Sunny
Cloudy
Rainy
Snowy
Misty
Data: Jan. to Aug. (Historical Vs 2026)

Comparison of Weather Condition (Historic Vs 2026)

HistoricDays

Year 2026Days

Change

sunnySunny
3592
162.8%
cloudyCloudy
6315
-76.1%
rainyRainy
7245
-37.5%
snowySnowy
1221
75%
mistyMisty
113
1200%

Disclaimer: Other weather conditions not shown may affect the total day count.

Climate Change Indicators:

Over the past 16 years, Thunder Bay has experienced measurable shifts in key climate parameters, contributing to the current severity score of 62 (within the Very High severity category). This suggests worsening climate conditions from the previous years. Here’s a breakdown of the specific changes observed:

Severity Score

62/100

Very High

Low
020
Moderate
40
High
60
Very High
80
Extreme
100

From 2010 to 2026, Thunder Bay experienced significant changes:

Temperature change of

+1.23 °C

Variation in annual rainfall

+78.42 %

Change in average humidity

-8.85 %

PM2.5 levels surged by

+19.2 %

Heatwave changed by

-4 Days

Coldwave changed by

-8 Days

Wind speeds changed by

-0.57 km/h

These indicators show a dramatic increase in volatility and worsening conditions. Thunder Bay's Very High severity status requires urgent and immediate adaptation and mitigation strategies, particularly focused on managing extreme weather events, improving air quality, and ensuring water resources are adequate for the population.

Check how we calculate Climate Change Severity
Based on data from Jan. to Aug.

Thunder Bay Weather Forecast 30 Days (September - October 2026)
Thunder Bay, Ontario, Canada

Condition
Temperature IconTemperature
Humidity IconHumi.
Wind IconWind Speed
Tue. 29, Sep.
overcastOvercast
Temperature Icon18°/14°
Humidity Icon90%
Wind Icon26.6km/h
Wed. 30, Sep.
sunnySunny
Temperature Icon22°/14°
Humidity Icon77%
Wind Icon25.6km/h
Thu. 1, Oct.
overcastOvercast
Temperature Icon17°/9°
Humidity Icon54%
Wind Icon24.1km/h
Fri. 2, Oct.
sunnySunny
Temperature Icon13°/5°
Humidity Icon59%
Wind Icon25.9km/h
Sat. 3, Oct.
overcastOvercast
Temperature Icon12°/7°
Humidity Icon66%
Wind Icon25.2km/h
Sun. 4, Oct.
sunnySunny
Temperature Icon10°/5°
Humidity Icon64%
Wind Icon34.9km/h
Mon. 5, Oct.
sunnySunny
Temperature Icon10°/2°
Humidity Icon57%
Wind Icon15.8km/h
Tue. 6, Oct.
sunnySunny
Temperature Icon10°/4°
Humidity Icon59%
Wind Icon22.7km/h
Wed. 7, Oct.
heavy rain at timesHeavy Rain
Temperature Icon12°/6°
Humidity Icon72%
Wind Icon20.3km/h
Thu. 8, Oct.
heavy rain at timesHeavy Rain
Temperature Icon13°/6°
Humidity Icon74%
Wind Icon20km/h
Fri. 9, Oct.
moderate rain at timesRain
Temperature Icon12°/6°
Humidity Icon75%
Wind Icon18.7km/h
Sat. 10, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon12°/6°
Humidity Icon77%
Wind Icon22.1km/h
Sun. 11, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon12°/6°
Humidity Icon80%
Wind Icon20.4km/h
Mon. 12, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon11°/6°
Humidity Icon79%
Wind Icon20.3km/h
Tue. 13, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon10°/5°
Humidity Icon76%
Wind Icon19.4km/h
Wed. 14, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon9°/3°
Humidity Icon76%
Wind Icon19.6km/h
Thu. 15, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon9°/4°
Humidity Icon76%
Wind Icon19.3km/h
Fri. 16, Oct.
moderate rain at timesRain
Temperature Icon9°/3°
Humidity Icon74%
Wind Icon21km/h
Sat. 17, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon9°/3°
Humidity Icon74%
Wind Icon21.8km/h
Sun. 18, Oct.
moderate rain at timesRain
Temperature Icon10°/4°
Humidity Icon74%
Wind Icon21.3km/h
Mon. 19, Oct.
heavy rain at timesHeavy Rain
Temperature Icon10°/4°
Humidity Icon76%
Wind Icon20km/h
Tue. 20, Oct.
moderate rain at timesRain
Temperature Icon9°/3°
Humidity Icon74%
Wind Icon17.9km/h
Wed. 21, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon8°/3°
Humidity Icon79%
Wind Icon19.8km/h
Thu. 22, Oct.
heavy rain at timesHeavy Rain
Temperature Icon9°/3°
Humidity Icon79%
Wind Icon18km/h
Fri. 23, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon7°/3°
Humidity Icon82%
Wind Icon20.4km/h
Sat. 24, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon8°/3°
Humidity Icon80%
Wind Icon19.5km/h
Sun. 25, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon7°/2°
Humidity Icon75%
Wind Icon18.7km/h
Mon. 26, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon6°/2°
Humidity Icon79%
Wind Icon21.4km/h
Tue. 27, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon6°/1°
Humidity Icon82%
Wind Icon22.7km/h
Wed. 28, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon6°/2°
Humidity Icon82%
Wind Icon20.6km/h
Thu. 29, Oct.
heavy rain at timesHeavy Rain
Temperature Icon6°/1°
Humidity Icon80%
Wind Icon17.7km/h

Highest & Lowest Weather Forecasts

TemperatureTemperature

High will be onWed. 30, Sep.

22°C

Low will be onTue. 27, Oct.

1°C

HumidityHumidity

High will be onTue. 29, Sep.

90%

Low will be onThu. 1, Oct.

54%

Wind SpeedWind Speed

High will be onSun. 4, Oct.

34.9km/h

Low will be onMon. 5, Oct.

15.8km/h

PrecipitationPrecipitation

High will be onWed. 21, Oct.

8.8mm

Low will be onWed. 30, Sep.

0.3mm

Ultraviolet IndexUV

High will be onThu. 1, Oct.

4

Low will be onFri. 23, Oct.

1

Our Blogs

See all blogs
New Delhi's August Heat Surge, Dust Storms, and September Reset

New Delhi's August Heat Surge, Dust Storms, and September Reset

AQI Newsroom11 Sept 2026
Gurgaon's August Heat Surge, Sandstorms, and September Cool-Off

Gurgaon's August Heat Surge, Sandstorms, and September Cool-Off

AQI Newsroom11 Sept 2026
Amritsar August Heat Surge: Rain Fades, Haze Holds Firm

Amritsar August Heat Surge: Rain Fades, Haze Holds Firm

AQI Newsroom2 Sept 2026
The Night a Wall of Dust Swallowed Phoenix: What 1,520 Air Quality Readings Reveal About Arizona's Air

The Night a Wall of Dust Swallowed Phoenix: What 1,520 Air Quality Readings Reveal About Arizona's Air

Gyane Haobijam24 Aug 2026
New Delhi's Brutal June-July Swing: From 45°C to Monsoon Lows

New Delhi's Brutal June-July Swing: From 45°C to Monsoon Lows

AQI Newsroom11 Aug 2026
London's July 2026 Heatwave: From 20°C to 34°C in Weeks

London's July 2026 Heatwave: From 20°C to 34°C in Weeks

AQI Newsroom11 Aug 2026
World Top 10 Hottest Cities Are All in India Again - May 2026

World Top 10 Hottest Cities Are All in India Again - May 2026

Gyane Haobijam4 Jun 2026
Delhi Air Quality 2026 vs 6-Year Historical PM2.5 Data

Delhi Air Quality 2026 vs 6-Year Historical PM2.5 Data

Gyane Haobijam2 Jun 2026
What 17 Years of Delhi Temperature Data Reveal About May's Heatwave Escalation

What 17 Years of Delhi Temperature Data Reveal About May's Heatwave Escalation

AQI Team27 May 2026
World Top Hottest Cities Belong to India - April 2026

World Top Hottest Cities Belong to India - April 2026

Gyane Haobijam28 Apr 2026
Construction Air Pollution: The Invisible Hazard Reshaping India's Urban Air

Construction Air Pollution: The Invisible Hazard Reshaping India's Urban Air

Gyane Haobijam27 Mar 2026
Kitchen Air Pollution: How Cooking Can Spike Your Indoor AQI

Kitchen Air Pollution: How Cooking Can Spike Your Indoor AQI

Gyane Haobijam17 Mar 2026
Mumbai Air Quality Comparison of 2025 Vs 2026 (Jan-Feb)

Mumbai Air Quality Comparison of 2025 Vs 2026 (Jan-Feb)

Gyane Haobijam14 Feb 2026
Why AQI Standards Vary Across the World - And Why Air Quality Index Matters More Than Ever

Why AQI Standards Vary Across the World - And Why Air Quality Index Matters More Than Ever

Navya12 Feb 2026
Why Winter Suffocates and Monsoon Saves Delhi Air Quality 2025?

Why Winter Suffocates and Monsoon Saves Delhi Air Quality 2025?

Gyane Haobijam2 Feb 2026